The best part of the finale is going to be the inevitable sneak peek at season 3. That's saying a lot, because I'm REALLY looking forward to this finale after that. I knew they would spice things up in an unexpected way instead of just set it up in a way that the comic book fans would predict it. The creators really know what they're doing in that regard.
The second thing you mentioned is the one scene I'm REALLY hoping is in the finale. Not that anything else would be a disappointment, because I'm sure there'll be enough excitement to go around next week, but it seems like the perfect way to lead in to the next season.